HI: Its a 283 I have tinkered with the idea of running my Impala on a chassis dyno to see what I get. I am also interested in improving gas mileage.
The engine was built in 1992 and run on a dyno for an hour before it was installed in the car. I have the dyno sheet and it shows 220 hp
Curious about your experiences with different dyno shops.
Cliff
I'd be hard pressed to say just what specs are in the engine now but it has a cam and larger pistons along with headers and a exhaust with an x pipe. Don't remeber what carb even.....
283 with 4 bbl would put out 220hp at the crank, with a bigger cam and headers I would think it would be closer to 250 hp. remember they only have 8.5 to 1 compression, i ran one with a 350hp 327 cam. It ate gas but would scream to 6500 rpm. I was fun with a 4200 stall and 4.11s. but on of the best improvements to power and economy was a pertronix modual in the distributor to get rid of the points,
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pontiax- (canadian pontiac X frame)1964 Parisienne 2dr. Hardtop ,lagoon aqua metallic (Q) ,421 cid Dart Industries block and heads. 550 hp. 575 ft lb of torque.
Cliff, remember, that the ethanol "crap" gas we have now you get less milage out of it!! Have you tried to run on non ethanol such as ESSO or Shell high test & see what you get. What gears are in the "ass end" can't be too stiff if you got 18mpg before???? Should be running high test anyway to stop the "failure" of fuel components" Repair shop here in town is flooded with garden equipment with fuel system problems. Gas is "eating" away carb bowls, fuel lines & insides of fuel tanks!!!! pete
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Some times I wake up GRUMPY, but today I let her sleep in !!!!!!!!BLACKSTOCK Ont.
My favourite tool for tuning the mixture and the timing on carburated cars is a vacuum gauge. Not fool proof but it will get you in the proper range with mixture at idle.
2nd tool I like to use is a G-Tech. It is an accelerometer and with it you can tell if you have made any performance improvements much the same as taking your car to a dyno. Only problem is that you need a road with little to no traffic to make 1/4 mile runs when testing. The nice part is that you get the same info and graphs that they do on a dyno when you load the G-tech data back on your computer. Of course there is no oxygen sensor doing it like this but there was no such thing when these cars were new. Have to check plug and tailpipe color just like old times.
This is just my two bits because I am not a huge fan of dyno testing. I think they are too expensive for the average guy. If you happen to be running an engine with some sort of boost (turbo or supercharger) then I think the dyno is worthwhile money spent.
